- Corporate Officers - M
- Mao Robert Yu Lang
Insider Trading History of Mao Robert Yu Lang
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Mao Robert Yu Lang since 2008.
This trader's CIK number is 1232218.
At the time of last reporting, Mao Robert Yu Lang was the Director of Energy Recovery, Inc.. (stock ticker symbol ERII).
Also see all insider trading activities at Energy Recovery, Inc..
Note that in the past
Mao Robert Yu Lang also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at 3com Corp (COMS) by Mao Robert Yu Lang
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2008 | COMS | 150,000 | $333,000 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Cypress Semiconductor Corp /de/ (CY) by Mao Robert Yu Lang
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2015 | CY | 0 | $0 | 0 | $0 | 36,842 | $0 |
Yearly summary of insider trading at Energy Recovery, Inc. (ERII) by Mao Robert Yu Lang
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2024 | ERII | 0 | $0 | 134,163 | $2,083,906 | 206,986 | $1,248,920 |
| 2023 | ERII | 0 | $0 | 251,383 | $4,496,121 | 361,399 | $3,291,285 |
| 2022 | ERII | 0 | $0 | 2,000 | $44,926 | 17,236 | $93,591 |
| 2020 | ERII | 0 | $0 | 9,500 | $116,080 | 45,708 | $113,812 |
| 2019 | ERII | 0 | $0 | 0 | $0 | 39,042 | $101,899 |
| 2017 | ERII | 20,000 | $150,620 | 0 | $0 | 0 | $0 |
| 2016 | ERII | 40,000 | $378,160 | 0 | $0 | 25,000 | $86,250 |
| 2014 | ERII | 50,000 | $228,291 | 0 | $0 | 0 | $0 |
| 2011 | ERII | 0 | $0 | 7,361 | $19,668 | 0 | $0 |
Insider trading activities at 3 companies by Mao Robert Yu Lang:
1. 3com Corp (COMS)
2. Cypress Semiconductor Corp /de/ (CY)
3. Energy Recovery, Inc. (ERII)
Table 1. Insider trading of 3com Corp (COMS) by Mao Robert Yu Lang
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2008-03-28 | COMS | Buy | 150,000 | 2.22 | 333,000 |
Table 2. Insider trading of Cypress Semiconductor Corp /de/ (CY) by Mao Robert Yu Lang
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2015-03-15 | CY | Option Ex | 36,842 | .00 | 0 |
Table 3. Insider trading of Energy Recovery, Inc. (ERII) by Mao Robert Yu Lang
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2024-05-22 | ERII | Option Ex | 27,067 | 7.79 | 210,851 |
| 2024-05-23 | ERII | Option Ex | 12,836 | 7.79 | 99,992 |
| 2024-05-22 | ERII | Sale | 21,045 | 13.86 | 291,662 |
| 2024-03-04 | ERII | Option Ex | 89,744 | 7.54 | 676,669 |
| 2024-03-04 | ERII | Sale | 35,779 | 15.74 | 563,233 |
| 2024-02-29 | ERII | Sale | 39,314 | 15.58 | 612,512 |
| 2024-03-01 | ERII | Sale | 38,025 | 16.21 | 616,499 |
| 2024-02-29 | ERII | Option Ex | 39,314 | 3.53 | 138,778 |
| 2024-03-01 | ERII | Option Ex | 38,025 | 3.23 | 122,630 |
| 2023-11-08 | ERII | Option Ex | 71,508 | 9.85 | 704,139 |
| 2023-11-07 | ERII | Option Ex | 159,891 | 9.85 | 1,574,446 |
| 2023-11-06 | ERII | Sale | 130,000 | 17.76 | 2,308,800 |
| 2023-11-07 | ERII | Sale | 121,383 | 18.02 | 2,187,321 |
| 2023-11-06 | ERII | Option Ex | 130,000 | 7.79 | 1,012,700 |
| 2022-08-09 | ERII | Sale | 2,000 | 22.46 | 44,926 |
| 2022-08-09 | ERII | Option Ex | 2,000 | 5.43 | 10,860 |
| 2022-08-10 | ERII | Option Ex | 15,236 | 5.43 | 82,731 |
| 2020-12-11 | ERII | Option Ex | 45,708 | 2.49 | 113,812 |
| 2020-12-11 | ERII | Sale | 9,500 | 12.22 | 116,080 |
| 2019-05-15 | ERII | Option Ex | 39,042 | 2.61 | 101,899 |
| 2017-03-14 | ERII | Buy | 20,000 | 7.53 | 150,620 |
| 2016-05-11 | ERII | Option Ex | 25,000 | 3.45 | 86,250 |
| 2016-03-11 | ERII | Buy | 40,000 | 9.45 | 378,160 |
| 2014-05-20 | ERII | Buy | 47,800 | 4.57 | 218,207 |
| 2014-05-21 | ERII | Buy | 2,200 | 4.58 | 10,084 |
| 2011-06-14 | ERII | Sale | 7,361 | 2.67 | 19,668 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Mao Robert Yu Lang
(Director of Energy Recovery, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.